Feature

  1. Astronomy

    Dark Doings

    A slew of new and proposed experiments, ranging from the cosmic to the subatomic scale, may shed light on why the expansion of the universe is speeding up.

    By Ron Cowen
  2. Anthropology

    Humanity’s Strange Face

    New fossil finds in a Romanian cave fuel controversy over whether different, closely related species interbred on the evolutionary path that led to people.

    By Bruce Bower
  3. Math

    Glimpses of Genius

    By studying a puzzle that Archimedes pondered 2,200 years ago, mathematicians are obtaining new insights into its intriguing geometric structure.

    By Erica Klarreich
  4. Physics

    The Rise of Antibubbles

    Tiny globules of water enclosed by thin shells of air in water that look like bubbles but don't act like them have recently become the objects of serious study.